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Unanswered: Trouble connecting from LAN

I've been working with Microsoft SQL Server for 10 years or so now. It's really about the only enterprise-level database I've ever used. As such, I thought it would be interesting to "see how the other half lives", so to speak, and I decided to tinker with PostgreSQL - on Linux, no less. I'm a glutton for punishment, I guess.

Anyway, I installed Debian 5.0 on a VirtualBox VM, running on my home theater PC at home. I then installed PostgreSQL using apt-get install postgresql (Debian repo provided version 8.3). I was able to connect locally and perform simple operations as the postgres user, such as \l.

I then installed pgAdmin III on my Windows 7 Ultimate 64-bit laptop. However, upon trying to connect, I received errors pertaining to the pg_hba.conf and postgresql.conf files. I did some research and made the following changes:

postgresql.conf
- Changed

Code:

listen_addresses = '*'

pg_hba.conf
- Added

Code:

host all all 192.168.0.0 255.255.255.0 ident sameuser

While trying various settings, I restarted the database service each time with pg_ctl restart -D /var/lib/postgresql/8.3/main.

Now, when trying to connect with pgAdmin, I get an hourglass for about a minute, then the following error:

An error has occurred:

Error connecting to the server: server closed the connection unexpectedly.

This probably means the server terminated abnormally
before or while processing the request.

When I bounce back to my ssh session, I am still able to connect locally and list the databases.

I'm sure it's something simple that I'm overlooking here. The problem is clearly in trying to connect from another machine on the LAN, but I've not been able to figure this one out.